The misdemeanor assault trial of ex-TV reporter Vince DeMentri is on hold at least until Tuesday, because the alleged victim is now insisting on continuing his testimony in Sinhala, the official language of his native Sri Lanka.

Manhattan prosecutors are plowing forward with the trial, despite defense assertions that the alleged victim lied on the stand Monday — in English — when he claimed the reporter slurred him with the n-word during an argument last year over a Midtown parking spot.

Chauffeur Hurley Senanayake, 55, who drives for the Bahamian ambassador, insisted that he’d told cops and prosecutors all along about the alleged slur.

Defense lawyer Jeffrey Lichtman counters that Senanayake concocted the n-word accusation for the first time on the witness stand, and that prosecutors admit Senanayake never told them of the slur. Senanayake declined to talk to a Post reporter yesterday.

“It is simply not possible to get a Sinhalese interpreter for today,” Manhattan Criminal Court Judge Abraham Clott said in explaining the delay.

DeMentri, 47, who worked for Channel 11, denies charges he slapped Senanayake in the face as the two argued over the chauffeur having parked the ambassador’s car in a spot reserved for press vehicles.